Both of these books are long out of date although they are still well-regarded
and consulted. Second hand copies of the first are usually available from
Amazon at reasonable prices. The publishers are considering making the
Croom Helm series available as eBooks and via Print on Demand, though
this has not yet reached fruition. A second edition of the Whittet book
is in preparation and will be available in 2011.

Chanin
1985. The Natural History of Otters. Croom Helm, Kent. 179pp.

Chanin
1994. Otters. Whittet Books, London 128pp.

A series of three publications arose from the
EU funded 'Life in UK Rivers' project: